Add selection cycle and gray pre-selection outlines to the Path tool, and Tab to swap Select/Path tools (#2818)

* Added initial version of this feature for the path tool

* Removed debug statements

* Thickened the overlay width

* Added hover highlighting for path tool

* Experimental switch to path tool at leaf layer

* Ghost outline initial implementation

* Added tab swap for select tool -> path tool

* Minor fix for Select Tool dbl click -> Path Tool

* Added support for ghosts when using GRS in the path tool

* Fixed GRS undo bug, vastly improved hover behavior and now clearly visualize next double click target

* Fixed unused import warnings

* Updated behavior to handle mouse movement cases, reverted line width to 1px

* Fixed merge behavioral issues

* Disabled Select Tool to Path Tool double click toggle, fixed single click drill through for special case

* Clean up of unused consts and comment

* Properly cancel the drill through state when the mouse moves

* Fix some stuff

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/tool/tool_message_handler.rs

@@ -284,6 +284,16 @@ impl MessageHandler<ToolMessage, ToolMessageContext<'_>> for ToolMessageHandler
 
 				document_data.update_working_colors(responses); // TODO: Make this an event
 			}
+			ToolMessage::ToggleSelectVsPath => {
+				// If we have the select tool active, toggle to the path tool and vice versa
+				let tool_data = &mut self.tool_state.tool_data;
+				let active_tool_type = tool_data.active_tool_type;
+				if active_tool_type == ToolType::Select {
+					responses.add(ToolMessage::ActivateTool { tool_type: ToolType::Path });
+				} else {
+					responses.add(ToolMessage::ActivateTool { tool_type: ToolType::Select });
+				}
+			}
 			ToolMessage::SwapColors => {
 				let document_data = &mut self.tool_state.document_tool_data;
 
@@ -359,9 +369,12 @@ impl MessageHandler<ToolMessage, ToolMessageContext<'_>> for ToolMessageHandler
 
 			ActivateToolBrush,
 
+			ToggleSelectVsPath,
+
 			SelectRandomWorkingColor,
 			ResetColors,
 			SwapColors,
+
 			Undo,
 		);
 		list.extend(self.tool_state.tool_data.active_tool().actions());